A Chinese teacher was sentenced to death for having poisoned 25 students between the ages of three and six of which one died, announced justice.

A court in Jiaozuo City, Henan Province (center) on Tuesday found teacher Wang Yun guilty of having put sodium nitrite in a bottle used by your students because he wanted revenge on the school he worked at.

The events occurred in March 2019. Sodium nitrite is a chemical used mainly for preserving meat, but in high doses can be very toxic.

According to the court, Wang knew the product was harmful, but that did not make her hesitate and poisoned the children “Without worrying about the consequences.”

It was not the first time that the teacher resorted to these practices, according to justice. In 2017 the woman tried to poison her husband after a marital dispute.